US8967312B2 - Battery pack tray - Google Patents
Battery pack tray Download PDFInfo
- Publication number
- US8967312B2 US8967312B2 US13/940,735 US201313940735A US8967312B2 US 8967312 B2 US8967312 B2 US 8967312B2 US 201313940735 A US201313940735 A US 201313940735A US 8967312 B2 US8967312 B2 US 8967312B2
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- US
- United States
- Prior art keywords
- cross member
- battery pack
- wall
- secured
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- H01M2/1038—
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- H01M2/1077—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/216—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for button or coin cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
- B60K2001/0438—Arrangement under the floor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0455—Removal or replacement of the energy storages
- B60K2001/0472—Removal or replacement of the energy storages from below
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a battery pack tray constituting a battery pack for mounting a battery on a vehicle such as an electric vehicle or a hybrid vehicle.
- a battery pack which houses batteries for supplying electric power to the motor is mounted.
- a plurality of battery modules are housed in a battery housing member such as a battery pack tray.
- JP-A-2010-284984 discloses a related art of a battery housing member such as a battery pack tray.
- a battery pan includes: a bottom surface potion on which batteries are to be placed; a wall portion which is upward bent from an outer peripheral edge portion of the bottom surface potion; a plurality of cross members which are coupled to the upper surface of the bottom surface potion, and in which the both ends are coupled to the wall portion; an outer peripheral frame which is continuous on the entire outer periphery of the wall portion; and a flange which is outward bent from the upper surface of the wall portion.
- a front stay which is to be coupled to a vehicle cross member is disposed in the entire intermediate portion of the battery pan in the vehicle width direction.
- a side stay which is to be coupled to a vehicle side frame is disposed in the entire region from a front end portion to an intermediate portion in the vehicle anteroposterior direction.
- the front and side stays are formed by bending a flat plate.
- the outer peripheral frame is attached to the entire outer periphery of the wall portion of the battery pan.
- the outer peripheral frame has a structure in which the outer peripheral frame outward projects from the outer periphery of the wall surface so as to maintain the strength and rigidity of the battery pan, and prevent rainwater churned by vehicle wheels from being directly sprayed to a joint portion between the battery pan and a cover attached to the upper surface of the battery pan.
- the shape of the outer peripheral frame has the strength and rigidity which are greater than those that are originally required in an outer peripheral frame. Consequently, the outer peripheral frame is heavy, and problematic in terms of material cost and handling.
- one end is fixed to the outer peripheral frame, and the other end is fastened to the corresponding one of the vehicle cross and side members.
- the dimension of the side frames in the vehicle width direction depends on the size and shape of the vehicle.
- the outer peripheral edge of the outer peripheral frame outward projects from the wall surface of the battery pan in a degree greater than required. Therefore, the relative distances between the outer peripheral edge of the outer peripheral frame, and the cross and side frames which are the attaching portions on the side of the vehicle body are short. As a result, there is a further problem in that a space in which a shape countermeasure for the strength and rigidity of the front and side stays is hardly ensured.
- the presently disclosed subject matter may provide a battery pack tray in which weight reduction is realized, and both the strength and the rigidity are improved
- the battery pack tray which constitutes a battery pack to be mounted on a vehicle may comprise: a tray body including: a bottom which has a concave-convex portion that includes a convex portion and a concave portion which extend in a first direction and on which a battery is to be placed; and a wall which is upward bent from a periphery of the bottom, the tray body having a substantially rectangular shape in a plan view; reinforcement frames provided along a pair of opposed wall portions of the wall in a second direction perpendicular to the first direction; a cross member disposed on an upper surface of the concave-convex portion, and forming a first closed cross-section with the concave-convex portion, both end portions of the cross member being secured to the reinforcement frames; an inner cross member secured to an upper surface of the cross member, both end portions of the inner cross member being secured to the reinforcement frames; and attachment brackets used for attachment to a vehicle body, and secured to the reinforcement frames, the attachment brackets projecting to an outside of the tray
- Each of the reinforcement frames may include: an inner frame forming a second closed cross-section with the wall, at a side where the battery is to be placed; and an outer frame forming a third closed cross-section with the wall, at a position opposed to the inner frame across the wall.
- a lower portion of a section shape may have an opening, and an end edge of the opening may be secured to the cross member, thereby forming a fourth closed cross-section, and both end portions of the inner cross member may be secured to the inner frames.
- a position where one of the attachment brackets is attached to the outer frame may be located in a portion opposed to a range where the cross member and the inner frame are coupled to each other.
- Each of the attachment brackets may include: an upper bracket formed with a recess in which a middle portion of a section is recessed along the projection direction, a tip end portion of the upper bracket formed with an attachment hole for attaching to the vehicle body, a basal end portion of the upper bracket coupled to the outer frame; and a lower bracket, one end portion of which forms a fifth closed cross-section with the recess in a range from a middle portion in the projection direction of the upper bracket to the basal end portion, and the other end portion of which is secured to a portion of the outer frame where the outer frame is joined to the tray body.
- FIG. 1 is an external view of an electric vehicle in an embodiment of the invention.
- FIG. 2 is an external perspective view of a battery pack in the embodiment of the invention.
- FIG. 3 is a view showing an example of a state where batteries are placed on a battery pack tray of the embodiment of the invention.
- FIG. 4 is a perspective view of the battery pack tray of the embodiment of the invention.
- FIG. 5 is a detail view of the coupling structure of an inner frame, cross member, and inner cross member in the embodiment of the invention.
- FIG. 6 is a sectional view taken along A-A in FIG. 4 .
- FIG. 7 is a sectional view taken along B-B in FIG. 4 .
- FIG. 8 is a sectional view taken along C-C in FIG. 4 .
- FIG. 9 is an end view looking in the direction of the arrow R in FIG. 8 .
- FIG. 1 is an external perspective view of an electric vehicle 100 in which the embodiment of the invention is used.
- a battery pack 1 is attached to an intermediate portion in a vehicle width direction between the front and rear wheels 120 , 130 of the vehicle body 110 .
- a controller 140 is connected to the battery pack 1 so as to perform a power supplying control in which electric power from batteries is supplied to driving motors via an inverter to control the driving force of the electric vehicle 100 , a charging control in which deceleration energy is subjected to regeneration and the batteries are charged, and the like.
- the battery pack 1 is detachably attached from the lower side of the electric vehicle 100 .
- the embodiment can be applied also to an electric vehicle, a hybrid vehicle, and the like.
- an electric vehicle, a hybrid vehicle, and the like are therefore generally referred to as “vehicle.”
- the battery pack 1 that, in a plan view, has a substantially rectangular shape which is elongated in a vehicle anteroposterior direction is configured by: a battery pack tray 2 on which battery modules 11 are placed; a cover device 9 which protects the battery pack tray 2 so that water and dust do not enter therein; an interconnection circuit device (not shown) which interconnects the batteries in the battery pack tray 2 .
- Each of the battery modules 11 is a device in which, for example, eight battery cells are assembled into one unit while they are juxtaposed, and electrodes are connected in series.
- FIG. 3 shows a state where, in the battery pack tray 2 , a total of ten battery modules 11 are regularly arranged in two rows in the vehicle width direction. Each of the rows consists of five battery modules.
- the battery modules 11 are connected to one another by the interconnection circuit device (not shown) to form an electric circuit.
- the circuit includes a circuit for connecting the battery modules in series to drive the electric vehicle 100 , and a circuit for operating instruments, lamps, and the like which are required for travelling of the electric vehicle 100 .
- FIG. 4 is an external perspective view of the battery pack tray 2 .
- the battery pack tray 2 is configured by: the tray body 3 on which the batteries are to be placed, and which has a substantially rectangular shape that is elongated in the vehicle anteroposterior direction in a plan view; reinforcement frames 5 which are disposed on the right and left sides of the tray body 3 along the outer peripheral portions of a longitudinal direction of the tray body 3 , respectively; cross members 7 which are arranged on the side of the tray body 3 where the battery modules 11 are placed; inner cross members 8 which are attached to the upper surfaces of the cross members 7 , respectively, which cooperate with the cross members 7 to improve the strength and rigidity of the battery pack tray 2 , and which functions as partitions for the battery modules 11 ; and attachment brackets 6 which are secured to the reinforcement frames 5 , and which are used for fixing the battery pack tray 2 to the vehicle body 110 .
- the tray body 3 has: a bottom 31 which is elongated in the vehicle anteroposterior direction in a plan view; a wall 32 which is upward bent form the peripheral edge of the bottom 31 ; and a flange 33 which outward extends from the upper edge of the wall 32 (see FIG. 6 ).
- ridge-like convex and concave portions 311 , 312 which are substantially rectangular in a plan view, which extend along the direction of the short sides, and which constitute a convex and concave portion having a trapezoidal sectional shape are alternately formed in the vehicle anteroposterior direction of the vehicle body 110 (see FIG. 7 ).
- First beads 313 which downward project, and which extend along the convex portions 311 are formed in the middles of the convex portions 311 in the vehicle anteroposterior direction, respectively.
- a pair of reinforcement frames 5 are disposed on walls 32 of the tray body 3 which are opposed to each other in the vehicle width direction.
- FIG. 6 shows a section along A-A in FIG. 4 and in detail the sectional shape of each of the reinforcement frames 5 .
- the reinforcement frame 5 is configured by: an inner frame 52 which is joined to the inner peripheral surface of the corresponding one of the walls 32 of the tray body 3 ; and an outer frame 51 which is disposed on the outer peripheral surface of the wall 32 , and at an opposed position across the wall 32 .
- the inner frame 52 includes: an A-flange 521 in which an upper portion is secured to an upper portion of the wall 32 ; a bent wall 522 which is bent from the lower end of the A-flange 521 in the direction along which the bent wall is separated from the wall 32 ; a vertical wall 523 which extends from the bent wall 522 to the bottom 31 while maintaining the gap with respect to the wall 32 ; and a B-flange 524 which is bent from the vertical wall 523 along the bottom 31 toward the middle of the tray body 3 , and which is secured to the bottom 31 .
- the inner frame forms a closed cross-section S 2 which is a second closed cross-section.
- the outer frame 51 includes: a C-flange 511 which is secured to the wall 32 at a position opposed to the A-flange 521 across the wall 32 ; a bent wall 512 which is bent from the lower end of the C-flange 511 in the direction along which the bent wall is separated from the wall 32 ; a vertical wall 513 which extends from the bent wall 512 to the outer side surface of the bottom 31 while maintaining the gap with respect to the wall 32 ; and a D-flange 514 which is bent from the lower end of the vertical wall 513 toward the wall 32 , which extends to a position opposed to the B-flange 524 , and which is secured to the outer side surface of the bottom 31 .
- the outer frame forms a closed cross-section S 3 which is a third closed cross-section.
- the inner frame 52 and the wall 32 form the closed cross-section S 2
- the outer frame 51 and the wall 32 form the closed cross-section S 3 .
- the outer frame 51 and the inner frame 52 have an integral shape in the state where they are opposed to each other across the wall 32 . Even when twisting and bending forces act on the battery pack tray 2 , therefore, the outer frame 51 and the inner frame 52 cooperate to maintain the rigidity and strength of the battery pack tray 2 .
- FIG. 7 shows a section along B-B in FIG. 4 and in detail the sectional shapes of the cross members 7 and the inner cross members 8 .
- the ridge-like convex and concave portions 311 , 312 which are substantially rectangular in a plan view, which extend along the direction of the short sides, and which constitute the convex and concave portion having a trapezoidal sectional shape are alternately formed in the bottom 31 of the tray body 3 .
- first beads 313 which downward project, and which extend along the convex portions 311 are formed in the middles of the convex portions 311 in the vehicle anteroposterior direction, respectively.
- the section in the vehicle anteroposterior direction has a hat-like sectional shape, and the both ends in the vehicle width direction are secured to the vertical walls 523 of the inner frames 52 , respectively (see FIG. 5 ).
- the lower portion opens, and the width (in the vehicle anteroposterior direction) of the opening is wider than the width of the corresponding convex portion 311 .
- E-flanges 71 outward extend from the both edges of the opening in the hat-like section.
- the cross member 7 straddles the convex portion 311 of the tray body 3 , the E-flanges 71 are secured to the middle portions of the front and rear concave portions 312 in the vehicle anteroposterior direction, respectively, and both end portions 311 a of the convex portion 311 and both end portions 71 a of the cross member 7 form closed cross-sections S 1 which are first closed cross-sections.
- a second bead 73 which projects toward the corresponding first bead 313 , and which is opposed to the first bead 313 is formed.
- the closed cross-sections S 1 which are formed by the tray body 3 and the cross member 7 , and the first and second beads enhance the strength and rigidity of this portion. Since the cross member 7 is on the side where the battery modules 11 are placed, moreover, rainwater does not intrude into the portions where the E-flanges 71 are secured. Therefore, a rust proofing process is not required, and the production cost can be reduced.
- an attachment flange 75 which is to be secured to the vertical wall 523 is formed by upward bending the top side 72 and the E-flanges 71 along the vertical wall 523 of the cross member 7 .
- a recess 525 corresponding to the thickness t of the attachment flange 75 is formed in a portion to which the attachment flange 75 is to be secured, so that, after the attachment flange 75 is joined to the recess 525 by spot welding or the like, the vertical wall 523 can maintain a flat surface.
- the inner cross member 8 in which the lower portion opens, the opening straddles the second bead 73 , and the section in the vehicle anteroposterior direction exhibits a hat-like shape is disposed along the second bead 73 of the cross member 7 .
- F-flanges 81 which outward extend from the edges of the opening are secured to the top side 72 of the cross member 7 , and the inner cross member 8 having a hat-like section, and the second bead 73 form a closed cross-section S 4 which is a fourth closed cross-section.
- G-flanges 85 which extend forward and rearward from the front and rear walls 83 of the hat-like section, respectively are secured both to the attachment flange 75 of the cross member 7 and to the vertical wall 523 of the inner frame 52 .
- a plurality of lightening holes 84 for reducing the weight are disposed in a middle portion of the height wall 83 in a vertical direction.
- the top surface 82 of the inner cross member 8 is situated at a substantially same level as the bent wall 522 of the inner frame 52 .
- the structure in which the structures of the cross member 7 and the inner cross member 8 are integrated with each other is formed by securing the G-flanges 85 both to the attachment flange 75 and to the vertical wall 523 .
- the second moment of area and the section modulus can be enhanced, and the strength and rigidity which are larger than the value that is obtained by adding their rigidities together can be obtained.
- attachment brackets 6 for attaching the battery pack tray 2 to the vehicle body 110 will be described with reference to FIG. 8 .
- Each of the attachment brackets 6 is configured by: an upper bracket 61 in which the base end is attached to the vertical wall 513 (web portion), and an attachment hole 616 for attaching the tray body to the vehicle body 110 is formed in another end portion; and a lower bracket 62 in which one end portion is secured to the D-flange 514 of the outer frame 51 , and the other end portion is secured to the lower surface of the upper bracket 61 in a range from an intermediate portion in the projection direction to the basal end side, to cooperate with the upper bracket 61 to form a closed cross-section S 5 .
- the section of the upper bracket 61 in the vehicle anteroposterior direction has a hat-like shape which downward opens, and which has H-flanges 611 that extend forward and rearward from the edges of the opening, respectively.
- the basal end side of the upper bracket 61 is upward bent along the vertical wall 513 of the outer frame 51 , and fastened to weld nuts 515 which are fixed to the side of the third closed cross-section of the vertical wall 513 of the outer frame 51 , by fixing bolts 615 through attachment holes disposed in the H-flanges 611 of the bent portion.
- the section of the other end side of the lower bracket 62 in the vehicle anteroposterior direction has a hat-like shape which upward opens, and which has J-flanges 621 that extend forward and rearward from the edges of the opening, respectively.
- a closed cross-section S 5 which is a fifth closed cross-section is formed by securing the H-flanges 611 and the J-flanges 621 together.
- the closed cross-section S 5 is formed in the vicinity of the portion where the upper bracket 61 is attached to the outer frame 51 . Therefore, the attachment bracket 6 is prevented from being upward deformed, and the rigidity and strength can be ensured.
- FIG. 9 shows an end view looking in the direction of the arrow R in FIG. 8 .
- the width of the cross member 7 in the vehicle anteroposterior direction is elongated, and in accordance with this the attachment flange 75 of the cross member 7 where the inner frame 52 and the cross member 7 are coupled to each other is set as a coupling range L which is wide in the vehicle anteroposterior direction.
- the load applied to the cross member 7 and the inner cross member 8 is efficiently transmitted from the attachment bracket 6 toward the vehicle body 110 , and the strength and rigidity as the battery pack tray 2 can be easily obtained.
- the attachment flange 75 for attaching the cross member 7 to the inner frame 52 is elongated in the vehicle anteroposterior direction (the dimension L). Therefore, the attachment range on the side of the vehicle body has a margin, and the attachment position on the side of the vehicle body 110 can be easily located at the position which is optimum from the viewpoint of the vehicle body structure.
- the wall 32 of the tray body 3 is sandwiched by the inner frame 52 and the outer frame 51 , and the closed cross-sections S 2 , S 3 are formed on the both sides of the wall 32 . Therefore, the rigidity of the wall 32 of the tray body 3 is improved, and the vertical and torsion rigidities of the reinforcement frame 5 are improved. As a result, the batteries can be surely held in a stable state.
- the structure is employed in which the cross member 7 and the inner cross member 8 are disposed on the side of the surface mounting the battery modules 11 in the tray body 3 . Therefore, rainwater intrusion from the outside into the joining surfaces between the tray body 3 and the cross member 7 , and the cross member 7 and the inner cross member 8 can be prevented from occurring.
- the structure is employed in which the cross member and the concave-convex portion of the bottom form the first closed cross-section S 1 , the inner cross member 8 is disposed on the upper surface of the cross member 7 , and both their side portions are coupled to the reinforcement frame 5 . Therefore, the weight (load) of the mounted battery modules 11 acts as a tension on the whole bottom of the tray body 3 , so that stresses generated in portions of the battery pack tray 2 are suppressed. As a result, the rigidity and durability of the battery pack tray 2 can be improved.
- the structure is employed in which the cross members and the inner cross members are disposed on the side of the battery mounting surface of the tray body. Therefore, joining surfaces between the tray body and the cross members, and the cross members and the inner cross members exist inside the tray body. Consequently, rainwater intrusion from the outside can be prevented from occurring without particularly disposing a rainwater intrusion preventing structure.
- the structure is employed in which the cross members and the concave-convex portion of the bottom form the first closed cross-sections, the inner cross members are disposed on the upper surfaces of the cross members, and both their side portions are coupled to the reinforcement frames. Therefore, the weight (load) of the mounted battery modules acts as a tension on the whole bottom of the tray body, so that stresses generated in portions of the battery pack tray are scattered. As a result, the rigidity and durability of the battery pack tray are improved.
- the wall of the tray body is sandwiched by the inner frame and the outer frame, and the closed cross-sections are formed on the both sides of the wall. Therefore, the rigidity of the wall of the tray body is improved, and the vertical and torsion rigidities of the reinforcement frame are improved. As a result, the battery modules can be surely held in a stable state.
- the fourth closed cross-section is formed above the cross member, and hence the rigidity and durability of the battery pack tray are further improved.
- the positions where the attachment brackets are attached to the outer frame are substantially opposed to the cross member and the inner cross member. Therefore, the offset amount between the positions of the cross member and the inner cross member in the vehicle anteroposterior direction, and the position of the attachment bracket in the vehicle anteroposterior direction is reduced, so that the reinforcement frame is prevented from being twisted and the efficiency of load transmission from the reinforcement frame to the vehicle body is improved. As a result, the strength and rigidity of the battery pack tray can be easily attained.
- the outer-frame side of the attachment bracket is formed into a closed cross-section structure. Therefore, the battery pack tray on which heavy batteries are mounted can be firmly attached to the vehicle body, so that the battery pack tray can be prevented from vibrating, and a stress which may be generated in the portions where the battery pack tray is attached to the vehicle body can be suppressed.
- the invention can be used as a battery pack tray for mounting batteries on a vehicle such as an electric vehicle or a hybrid vehicle.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Battery Mounting, Suspending (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-157229 | 2012-07-13 | ||
JP2012157229A JP6020958B2 (en) | 2012-07-13 | 2012-07-13 | Battery pack tray |
Publications (2)
Publication Number | Publication Date |
---|---|
US20140014428A1 US20140014428A1 (en) | 2014-01-16 |
US8967312B2 true US8967312B2 (en) | 2015-03-03 |
Family
ID=48771332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/940,735 Active 2033-08-23 US8967312B2 (en) | 2012-07-13 | 2013-07-12 | Battery pack tray |
Country Status (4)
Country | Link |
---|---|
US (1) | US8967312B2 (en) |
EP (1) | EP2685523B1 (en) |
JP (1) | JP6020958B2 (en) |
CN (1) | CN103538455B (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140165354A1 (en) * | 2011-06-20 | 2014-06-19 | Kabushiki Kaisha Toyota Jidoshokki | Vehicle battery unit installation apparatus |
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Also Published As
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US20140014428A1 (en) | 2014-01-16 |
CN103538455A (en) | 2014-01-29 |
EP2685523B1 (en) | 2018-01-31 |
CN103538455B (en) | 2016-06-29 |
JP2014019203A (en) | 2014-02-03 |
EP2685523A1 (en) | 2014-01-15 |
JP6020958B2 (en) | 2016-11-02 |
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